Defined Benefit Plan Percentage Changes In Discount Rate

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- Definition

Defined Contribution Plan Age Limit Of Employees To Be Eligible For Catch Up Contribution

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- Definition

Defined Contribution Plan Eligibility Minimum Service Period

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- Definition

Defined Contribution Plan Employer Matching Contribution Percent Of Match

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- Definition

Defined Contribution Plan Employer Matching Percent Of Employee Contribution

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- Definition

Percentage Of Non Matching Contribution To Participants

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- Definition

Face (par) amount of the original debt instrument that was repurchased.

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- Definition

The aggregate amount in accumulated other comprehensive income expected to be recognized as a component of net periodic benefit cost over the fiscal year that follows the most recent annual statement of financial position presented, including the net gain (loss), net prior service cost or credit, and net transition asset or obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

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-Paragraph 1

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 158

-Paragraph 7

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

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-Paragraph 5

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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- Definition

The increase in the fair value of plan assets from contributions made by the employer.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 5

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- Definition

The employer's best estimate, as soon as it can be reasonably determined, of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position. Estimated contributions may be presented in the aggregate combining (1) contributions required by funding regulations or laws, (2) discretionary contributions, and (3) noncash contributions.

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- Definition

Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

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- Definition

Maximum percentage of employee gross pay, by the terms of the plan, that the employer may contribute to a defined contribution plan.

+ References

No definition available.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The increase (decrease) during the reporting period in the amount due to fund pension and non-pension benefits to employees, retired and disabled former employees.

+ References

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 28

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- Definition

The amount of pension benefit costs recognized during the period for (1) defined benefit plans and (2) defined contribution plans. For defined benefit plans, pension expense includes the following components: service cost, interest cost, expected return on plan assets, gain (loss) on plan assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. For defined contribution plans, the pension expense generally equals the firm's contribution to employees' accounts (if the firm contributes) during the period.

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Retirement Benefits - Additional Information (Detail) (USD $)	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012	Apr. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Average annual compensation period	10 years
Defined pension benefit plan, net periodic benefit cost	$ 1,138,000
Pension expense	1,000,000	402,000
Anticipated contribution in the next fiscal year related to pension plans	370,000
Age limit of employees to be eligible for contribution	21 years
Minimum service period of employees to be eligible for contribution	3 months
Matching contributions by company	100.00%
Employee's compensation	3.00%
Companies matching contribution equal to employee's contributions	50.00%
Non-matching contribution for participants employed	1.00%
Contribution make by company	1,000,000	402,000	847,000
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee's compensation	5.00%
Contributions by employer per employee's compensation maximum	4.00%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee's compensation	3.00%
Scenario One [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase decrease in the discount rate	1.00%
Decrease increase pension expense	(166,000)	152,000
Scenario One [Member] \| Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Par amount outstanding	250
Scenario Two [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase decrease in the discount rate	1.00%
Decrease increase pension expense	$ (143,000)	$ 149,000
Scenario Two [Member] \| Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Plan asset percentage	70.00%	70.00%
Scenario Two [Member] \| Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, Plan asset percentage	30.00%	30.00%